EP0348591A2 - Schraubenrotor-Auflader - Google Patents

Schraubenrotor-Auflader Download PDF

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Publication number
EP0348591A2
EP0348591A2 EP89101286A EP89101286A EP0348591A2 EP 0348591 A2 EP0348591 A2 EP 0348591A2 EP 89101286 A EP89101286 A EP 89101286A EP 89101286 A EP89101286 A EP 89101286A EP 0348591 A2 EP0348591 A2 EP 0348591A2
Authority
EP
European Patent Office
Prior art keywords
female
rotor
supercharger
teeth
male
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP89101286A
Other languages
English (en)
French (fr)
Other versions
EP0348591A3 (de
Inventor
Noboru Tsuboi
Kazuo Kubo
Kunihiko Nishitani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of EP0348591A2 publication Critical patent/EP0348591A2/de
Publication of EP0348591A3 publication Critical patent/EP0348591A3/de
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F02B33/36—Engines with pumps other than of reciprocating-piston type with rotary pumps of positive-displacement type

Definitions

  • This invention relates to a screw type mechanical supercharger for use with a reciprocating internal combustion engine which is used, for example, for automobiles, marine vessels or general industries.
  • Such a screw type mechanical supercharger of the oil free type as shown in Fig. 3 is already known which is mechanically driven by way of a power transmitting mechanism including a gear, a belt or a chain by a crankshaft which is an output power shaft 10 of an engine not shown.
  • a body of the supercharger includes a pair of male and female screw rotors 11 and 12 held in a mutually meshing condition with each other with a small gap left therebetween without contacting with each other.
  • the screw rotors 11 and 12 are connected to rotate in a synchronized relationship by a pair of synchronizing gears 13 and 14 which are mounted on one ends of rotor shafts and held in meshing engagement with each other.
  • a small gear 15 is mounted at the other end of the shaft of the male rotor 12 while a large gear 17 is mounted on an input power shaft 16 which is connected to be driven by the engine not shown.
  • the large gear 17 is held in meshing engagement with the small gear 15 so that the male rotor 12 may be driven by the engine not shown.
  • the female rotor 11 is thus driven in a synchronized relationship by the rotor 12 by way of the synchronizing gears 13 and 14.
  • Such a supercharger as described above commonly employs a combination of a male rotor having 4 or 5 teeth and a female rotor having 6 teeth.
  • driving force is transmitted in the order of the input power shaft 16, large gear 17, small gear 15, male rotor 12, synchronizing gears 14 and 13 and female rotor 11 to rotate the two rotors 12 and 11, thereby to compress air sucked in from one side of the rotors 12 and 11 and forward or feed the compressed air from the other side of the rotors 12 and 11 into the engine.
  • a supercharger is required to provide a compression pressure of about 2 kg ⁇ G/cm2 from the characteristic thereof, it is required, in the case of a large vehicle such as a truck, to provide an amount of supercharged air of about 10 m3/min.
  • a screw type mechanical supercharger which comprises a pair of female and male screw rotors held in a mutually meshing condition with each other, and a pair of synchronizing gears mounted for integral rotation with the screw rotors and held in meshing engagement with each other to establish synchronous rotation of the female and male screw rotors, the female rotor having six teeth while the male rotor has three teeth, the synchronizing gear for the female rotor having a number of teeth twice that of the other synchronizing gear for the male rotor, the female rotor being connected to be driven by a reciprocating internal combustion engine so as to serve as an input power shaft of the supercharger.
  • the screw rotors are made of a lighter weight material.
  • the screw type mechanical supercharger since the male rotor has three teeth and the female rotor has six teeth, the theoretical stroke volume of a compression chamber of the supercharger which is defined by the female and male rotors and an inner wall of a casing in which the female and male rotors are accommodated is increased, and accordingly, the discharge of the supercharger for each rotation is increased.
  • the supercharger since the supercharger is driven at the female rotor thereof, the rotational speeds of the rotors are increased, and accordingly, a great discharge can be assured even where the rotors are comparatively small in size.
  • the supercharger can be reduced in overall size and weight.
  • the synchronizing gears can attain a function of a speed increasing gear.
  • the supercharger has a similar rotor size as in a conventional supercharger, it can provide a greater amount of supercharged air.
  • the supercharger can be further reduced in weight.
  • the screw type mechanical supercharger shown includes a pair of male and female screw rotors 1 and 2 accommodated in a casing not shown and held in a mutually meshing condition with each other with a small gap left therebetween, and a pair of synchronizing gears 3 and 4 mounted at one ends of the rotors 1 and 2 and held in meshing engagement with each other so as to establish synchronized rotation of the rotors 1 and 2.
  • a shaft of the female rotor 1 is connected to be driven to rotate by an engine not shown.
  • driving force is transmitted in the order of the female rotor 1, synchronizing gear 3 for the female rotor 1, synchronizing gear 4 for the male rotor 2, and male rotor 2 to rotate the rotors 1 and 3 in order to feed air in such a manner as described hereinabove.
  • the female rotor 1 has 6 teeth while the male rotor 2 has 3 teeth. Accordingly, a compression chamber of the supercharger which is defined by the female and male rotors 1 and 2 has an increased capacity or volume, and the male rotor 2 on the driven side has a rotational speed twice that of the female rotor 1. Therefore, also the synchronizing gear 3 on the female rotor 1 side has a number of teeth twice that of the synchronizing gear 4 on the male rotor 2 side.
  • the synchronizing gears 3 and 4 in the supercharger are provided with a speed increasing function in addition to a synchronizing function. Accordingly, it is sufficient to provide a gearing only at a single location as distinct from such a conventional supercharger as shown in Fig. 3, thereby enabling the entire device to be reduced in size and weight.
  • the rotors may be formed from a lighter weight material such as, for example, an aluminum alloy or an engineering plastic in order to further reduce the weight of the supercharger.
  • the present invention is not limited to the specific configuration, and where, for example, the output power shaft and the shaft of the female rotor 1 are otherwise offset, rotation may be transmitted between the two shafts by way of a suitable motion transmitting means such as, for example, a belt.
  • a screw type mechanical supercharger which is small in size but has a large capacity.
  • the supercharger comprises a pair of female and male screw rotors held in a mutually meshing condition with each other, and a pair of synchronizing gears mounted for integral rotation with the screw rotors and held in meshing engagement with each other to establish synchronous rotation of the female and male screw rotors.
  • the female rotor has six teeth while the male rotor has three teeth, and the synchronizing gear for the female rotor has a number of teeth twice that of the other synchronizing gear for the male rotor.
  • the female rotor is connected to be driven by a reciprocating internal combustion engine so as to serve as an input power shaft of the supercharger.
  • the screw rotors are preferably formed from a lighter weight material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
EP89101286A 1988-06-29 1989-01-25 Schraubenrotor-Auflader Ceased EP0348591A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP161549/88 1988-06-29
JP63161549A JPH0211820A (ja) 1988-06-29 1988-06-29 スクリュ形機械式過給機

Publications (2)

Publication Number Publication Date
EP0348591A2 true EP0348591A2 (de) 1990-01-03
EP0348591A3 EP0348591A3 (de) 1990-05-23

Family

ID=15737222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89101286A Ceased EP0348591A3 (de) 1988-06-29 1989-01-25 Schraubenrotor-Auflader

Country Status (3)

Country Link
US (1) US4951638A (de)
EP (1) EP0348591A3 (de)
JP (1) JPH0211820A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495221A1 (de) * 1991-01-18 1992-07-22 MAN Nutzfahrzeuge Aktiengesellschaft Brennkraftmaschine mit Luftpresser

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3362162B2 (ja) * 1995-12-28 2003-01-07 ヤマハ発動機株式会社 スーパーチャージャー付ｖ型エンジン
US6405692B1 (en) * 2001-03-26 2002-06-18 Brunswick Corporation Outboard motor with a screw compressor supercharger
JP2004148917A (ja) * 2002-10-29 2004-05-27 Kawasaki Heavy Ind Ltd 小型滑走艇
US7082932B1 (en) * 2004-06-04 2006-08-01 Brunswick Corporation Control system for an internal combustion engine with a supercharger
US20090288648A1 (en) * 2008-05-21 2009-11-26 Gm Global Technology Operations, Inc. Superchargers with dual integral rotors
US8813492B2 (en) * 2009-10-14 2014-08-26 Hansen Engine Corporation Internal combustion engine and supercharger
EP2859201B1 (de) * 2012-06-09 2016-10-19 Eaton Corporation Aufladerübertragung und verfahren zur herstellung der aufladerübertragung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481527A (en) * 1944-06-29 1949-09-13 Jarvis C Marble Rotary multiple helical rotor machine
US2691482A (en) * 1952-07-17 1954-10-12 Equi Flow Inc Method and apparatus for compressing and expanding gases
US3182900A (en) * 1962-11-23 1965-05-11 Davey Compressor Co Twin rotor compressor with mating external teeth
DE2409554A1 (de) * 1974-02-28 1975-09-11 H & H Licensing Corp Schraubenkompressor mit in einem gehaeuse befindlichen rotoren
JPS5137316A (ja) * 1974-09-27 1976-03-29 Honda Motor Co Ltd Kakyushikienjin
JPS5393411A (en) * 1977-01-27 1978-08-16 Honda Motor Co Ltd Screw blower
FR2530742B1 (fr) * 1982-07-22 1987-06-26 Dba Compresseur volumetrique a vis
US4504203A (en) * 1983-01-18 1985-03-12 Delta Screw Nederland B.V. Apparatus adapted for use as a screw compressor for motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495221A1 (de) * 1991-01-18 1992-07-22 MAN Nutzfahrzeuge Aktiengesellschaft Brennkraftmaschine mit Luftpresser

Also Published As

Publication number Publication date
US4951638A (en) 1990-08-28
JPH0211820A (ja) 1990-01-16
EP0348591A3 (de) 1990-05-23

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